https://en.chessbase.com/post/london-1883-prelude-to-the-first-world-championship-match-april-26-1883-june-23-1883
1st World Chess Championship
About The Tournament
The World Chess Championship 1886 was the first official World Chess Championship match contested by Wilhelm Steinitz and Johannes Zukertort. The match took place in the United States from 11 January to 29 March, the first five games being played in New York City, the next four being played in St. Louis and the final eleven in New Orleans. The winner was the first player to achieve ten wins. Wilhelm Steinitz won the match 10–5, winning his tenth game in the twentieth game of the match. There were five draws.
Background
Previously, there were a number of "unofficial" world championship matches held between the undisputed leading players of the day, but talk of an official World Championship did not occur prior to the 1866 match between Steinitz and Adolf Anderssen. Steinitz won that match (+8−6=0) and although he made no known reference to a "World Championship" at the time, in later life he would sometimes backdate the tenure of his reign to the date of the Anderssen match. However, most historians now accept that the 1886 match between Steinitz and Zukertort was the first official World Championship match.
Preparations
Steinitz challenged Zukertort to a one-on-one match the day after the conclusion of London 1883.[5] As there was a degree of hostility between them, the match arrangements were somewhat protracted and lasted almost three years. Disagreement over the choice of venue was resolved when Steinitz finally persuaded Zukertort to accept the United States, his new place of residence, over London. This was mostly due to the better conditions offered to the players by the American organizers. Zukertort was given the princely sum of $750 to make the trip across the Atlantic, and the winner of the match was promised a quarter of the proceeds from the betting syndication.
Prize
Wilhelm Steinitz won $1,000 from the 1886 World Chess Championship match against Johannes Zukertort. The match was played for a stake of $2,000, with $1,000 going to the winner and $1,000 going to the loser.
Result
The winner would be the first to 10 wins, draws not counting. In the event of a 9–9 tie, neither player would be champion. Steinitz won, thus becoming the first official world champion.

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Source
Wikipedia, https://en.wikipedia.org/wiki/World_Chess_Championship_1886
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